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Nathan Brown cleaning the viewport windows on Alvin prior to a dive.

Nathan Brown cleaning the viewport windows on Alvin prior to a dive.
Nathan Brown cleaning the viewport windows on Alvin prior to a dive.
Nathan Brown cleaning the viewport windows on Alvin prior to a dive.
Nathan Brown cleaning the viewport windows on Alvin prior to a dive.
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Linder, Christopher L.
Nathan Brown cleaning the viewport windows on Alvin prior to a dive.
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03/15/2014
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Image Of the Day caption:
Nathan Brown, an Alvin pilot-in-training, cleans a viewport on the sub in the early-morning hours before Alvin was launched from research vessel Atlantis into the Gulf of Mexico on March 15, 2014. It would be the subs first scientific dive after a 39-month hiatus and a major overhaul that dramatically upgraded its abilitiesand Browns first dive in the sub. He, Pilot Bob Waters, and WHOI scientist Susan Humphris spent five hours at the seafloor testing Alvins new propulsion, command-and-control, and imaging systems. Read more about Alvins return to service at the cruise blog.
Caption from Oceanus magazine, Vol. 51, No. 1, pg. 62 (small insert):
About 6 a.m, the Alvin Operations Group begins pre-dive checks. "We're swarming around the submarine like ants," said engineer assistant and pilot-in-training Jefferson Grau. Group members check all systems that contain oil to make sure theres no air in them. The oil keeps parts from collapsing at the high pressures of great depth. They polish windows and lights, disconnect battery charging cables, and switch the vehicle to battery power. Inside the sub, they check electrical circuits, emergency supplies, and the ballast system.
Photo by Chris Linder
© Woods Hole Oceanographic Institution
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